Import Demo Page Errors

I selected the Broadnews theme. I use AF Companion to import the General demo site and received many errors:

---Importing content---
[ERROR] Failed to import "wing-light-boat-night-reflection-vehicle-174598-pxhere.com_" (Media)
[ERROR] Failed to import "sidebar-promo-red-" (Media)
[ERROR] Failed to import "banner-promo-black-" (Media)
[ERROR] Failed to import "sidebar-promo-red-1-1" (Media)
[ERROR] Failed to import "af-themes-main-dark" (Media)
[ERROR] Failed to import "negative-space-girl-in-grass" (Media)
[ERROR] Failed to import "negative-space-snow-capped-mountain" (Media)
[ERROR] Failed to import "negative-space-a-snow-capped-mountain-summit" (Media)
[ERROR] Failed to import "negative-space-man-ice-mountain-winter-lake-ricardo-bresciani-thumb-1" (Media)
[ERROR] Failed to import "negative-space-dalmation-dog-woman-blonde-summer-happy-daria-shevtsova-thumb-1" (Media)
[ERROR] Failed to import "negative-space-beard-businessman-smile-coffee-books-office-happy-bruce-mars-thumb-1" (Media)
[ERROR] Failed to import "negative-space-man-climbing-volcanic-rock-sea-ocean-water-jacket-yellow-black-male-thumb-1" (Media)
[ERROR] Failed to import "negative-space-hot-air-balloons-mountains-pixabay-thumb-1" (Media)
[ERROR] Failed to import "negative-space-vibrant-dusk-sunset" (Media)
[ERROR] Failed to import "negative-space-red-fall-leaf" (Media)
[ERROR] Failed to import "negative-space-green-lensball" (Media)
[ERROR] Failed to import "cropped-negative-space-snow-capped-mountain.jpg" (Media)
[ERROR] Failed to import "negative-space-woman-smile-sunglasses-reflect-happy-model-female-girl-thumb-1" (Media)
[ERROR] Failed to import "negative-space-nature-woman-bride" (Media)
[ERROR] Failed to import "negative-space-alaskan-glacier-wide" (Media)

Max execution time after content import = 300

Can you please check and see why?

Thanks very much,

John